The M4E1 Carbine – Monolithic strength and accuracy without the monolithic commitment.

The AR15 weapon system is an ever-evolving and modular system. That weapon system has now been enhanced by Aero Precision into the new M4E1 platform. The M4E1 upper receiver is precision-machined to our specifications and features M4 feed ramps and handguard mounting platform. The rail mounting surface and barrel nut area provide a much stiffer system than a standard receiver, giving you more accuracy out of your rifle. Lightweight by design, stronger through superior engineering, the M4E1 delivers monolithic accuracy in a lightweight package.

Built with the M4E1 Enhanced Upper Receiver

The M4E1 begins with our all new state-of-the-art forged upper receiver. The M4E1 upper receiver is a one-piece design combining the rail's mounting surface with the upper itself. By machining the rail's mounting surface into the upper itself we have condensed the parts needed to mount a free-floated rail to a mere 8 screws. The M4E1 rail system gives you options such as Keymod, M-LOK, and standard Picatinny, as well as lengths ranging from 7" to 15".

Built with an AP Multi Caliber Lower Receiver

Our lower receivers are machined beyond industry standards. Learn more about our lower receiver features or shop now.

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AeroPrecision Rifles